ICD-P110VTP - Sony Audio Service Manual (repair manual). Page 12

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6.  RTC connection and operation
This mode provides self-check of the RTC connection and operation.
It includes three checks: RTC connection check, data write and read check, and XRTCINTR (interrupt signal) check. There is no layer
(display) for operation selection.
Result of this check is shown as “OK” or “BAD”.

Bx

x

Item selection display

Result display

Result display

Check OK

Check NG

STOP

7.  A/D KEY voltage
This mode displays the CPU input voltages of KEYIN0 and KEYIN1 in hexadecimal (HEX) format.
Pressing of a specific key causes the corresponding voltage to be displayed.
In this mode, the  x STOP  key will display the corresponding voltage while it is being pressed. The display will be returned to the layer for
item selection by releasing the  x STOP  key. There is no layer (display) for operation selection.

Bx

x

Item selection display

Result display

Voltage of KEYIN0 

Voltage of KEYIN1

STOP

8.  BATTERY/DC-IN CPU input detection voltage
This mode displays the CPU input voltage of either BATTERY or DC-IN in hexadecimal (HEX) format.
A battery full mark is shown during BATTERY operation and this mark is extinguished during DC-IN operation. There is no layer (display)
for operation selection.

Bx

x

Item selection display

Result display

Voltage

BATTERY : FULL mark 
DC-IN : No display

STOP